| US 7,572,224 B2 | ||
| Ultrasonic probe and ultrasonic diagnostic apparatus | ||
| Yasuharu Hosono, Yokohama (Japan); Yohachi Yamashita, Yokohama (Japan); and Kazuhiro Itsumi, Kawasaki (Japan) | ||
| Assigned to Kabushiki Kaisha Toshiba, Tokyo (Japan) | ||
| Filed on Sep. 13, 2005, as Appl. No. 11/223,969. | ||
| Claims priority of application No. 2004-286583 (JP), filed on Sep. 30, 2004. | ||
| Prior Publication US 2006/0079785 A1, Apr. 13, 2006 | ||
| Int. Cl. A61B 7/04 (2006.01) | ||
| U.S. Cl. 600—459 [600/462; 310/333; 310/311] | 20 Claims |
| 1. An ultrasonic probe, comprising:
a piezoelectric element;
a first acoustic matching layer provided on the front face of the piezoelectric element and formed of a solid inorganic material;
and
a second acoustic matching layer provided on the first acoustic matching layer and formed of a mixture of an organic resin
and 10 to 30% by volume of oxide powder with a density of 6.5 g/cm3 or more.
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